multiple styles

[bushido_man96]

In the area I live and train my teacher is the only one of two, maybe three who teach traditional Okinawan karate. Other styles all as popular as ever and there are several high-profile commercial schools around us. Having experience in other systems is not as important in being confident in one's own skills and the system one teaches. Practising and teaching a single system that one wholeheartedly believes in should not be an obstacle to taking an interest in others. An instructor who is fully confident in his skills and teaching method will never be afraid or concerned if students take an interest in other systems.

I don't disagree with you at all. I just see where the concern for some instructors comes into play. I think it shows how insecure some instructors are, as well.